Waveshare MQ-3 Gas Sensor, MQ-3
Prices updated 19 May 2026
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Product Description
Overview1. Sensitive for alcohol, ethanol2. Output voltage boosts along with the concentration of the measured gases increases3. Fast response and recovery4. Adjustable sensitivity5. Signal output indicatorSpecifications1. Power: 2.5V ~ 5.0V2. Dimension: 40.0mm * 21.0mm3. Mounting holes size: 2.0mmApplications1. Car alcohol alarm2. BreathalyserHow to UseIn the case of working with a MCU:1. VCC: 2.5V ~ 5.0V2. GND: Power supply ground3. AOUT: MCU.IO (analog output)4. DOUT: MCU.IO (digital output)Package Contents1. MQ-3 Gas Sensor x12. 4-pin custom connector jumper wire x1Specification: Package Weight One Package Weight 0.06kgs / 0.13lb One Package Size 5cm * 4cm * 1cm / 1.97inch * 1.57inch * 0.39inch Qty per Carton 4800 Carton Weight 288.00kgs / 634.92lb Carton Size 60cm * 40cm * 40cm / 23.62inch * 15.75inch * 15.75inch Loading Container 20GP: 277 cartons * 4800 pcs = 1329600 pcs40HQ: 644 cartons * 4800 pcs = 3091200 pcs
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